include/wx/prntbase.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/prntbase.h
   3 // Purpose:     Base classes for printing framework
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_PRNTBASEH__
  13 #define _WX_PRNTBASEH__
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_PRINTING_ARCHITECTURE
  18
  19 #include "wx/event.h"
  20 #include "wx/cmndata.h"
  21 #include "wx/panel.h"
  22 #include "wx/scrolwin.h"
  23 #include "wx/dialog.h"
  24 #include "wx/frame.h"
  25 #include "wx/dc.h"
  26
  27 class WXDLLIMPEXP_FWD_CORE wxDC;
  28 class WXDLLIMPEXP_FWD_CORE wxButton;
  29 class WXDLLIMPEXP_FWD_CORE wxChoice;
  30 class WXDLLIMPEXP_FWD_CORE wxPrintout;
  31 class WXDLLIMPEXP_FWD_CORE wxPrinterBase;
  32 class WXDLLIMPEXP_FWD_CORE wxPrintDialogBase;
  33 class WXDLLIMPEXP_FWD_CORE wxPrintDialog;
  34 class WXDLLIMPEXP_FWD_CORE wxPageSetupDialogBase;
  35 class WXDLLIMPEXP_FWD_CORE wxPageSetupDialog;
  36 class WXDLLIMPEXP_FWD_CORE wxPrintPreviewBase;
  37 class WXDLLIMPEXP_FWD_CORE wxPreviewCanvas;
  38 class WXDLLIMPEXP_FWD_CORE wxPreviewControlBar;
  39 class WXDLLIMPEXP_FWD_CORE wxPreviewFrame;
  40 class WXDLLIMPEXP_FWD_CORE wxPrintFactory;
  41 class WXDLLIMPEXP_FWD_CORE wxPrintNativeDataBase;
  42 class WXDLLIMPEXP_FWD_CORE wxPrintPreview;
  43
  44 //----------------------------------------------------------------------------
  45 // error consts
  46 //----------------------------------------------------------------------------
  47
  48 enum wxPrinterError
  49 {
  50     wxPRINTER_NO_ERROR = 0,
  51     wxPRINTER_CANCELLED,
  52     wxPRINTER_ERROR
  53 };
  54
  55 //----------------------------------------------------------------------------
  56 // wxPrintFactory
  57 //----------------------------------------------------------------------------
  58
  59 class WXDLLIMPEXP_CORE wxPrintFactory
  60 {
  61 public:
  62     wxPrintFactory() {}
  63     virtual ~wxPrintFactory() {}
  64
  65     virtual wxPrinterBase *CreatePrinter( wxPrintDialogData* data ) = 0;
  66
  67     virtual wxPrintPreviewBase *CreatePrintPreview( wxPrintout *preview,
  68                                                     wxPrintout *printout = NULL,
  69                                                     wxPrintDialogData *data = NULL ) = 0;
  70     virtual wxPrintPreviewBase *CreatePrintPreview( wxPrintout *preview,
  71                                                     wxPrintout *printout,
  72                                                     wxPrintData *data ) = 0;
  73
  74     virtual wxPrintDialogBase *CreatePrintDialog( wxWindow *parent,
  75                                                   wxPrintDialogData *data = NULL ) = 0;
  76     virtual wxPrintDialogBase *CreatePrintDialog( wxWindow *parent,
  77                                                   wxPrintData *data ) = 0;
  78
  79     virtual wxPageSetupDialogBase *CreatePageSetupDialog( wxWindow *parent,
  80                                                           wxPageSetupDialogData * data = NULL ) = 0;
  81
  82     virtual wxDCImpl* CreatePrinterDCImpl( wxPrinterDC *owner, const wxPrintData& data ) = 0;
  83
  84     // What to do and what to show in the wxPrintDialog
  85     // a) Use the generic print setup dialog or a native one?
  86     virtual bool HasPrintSetupDialog() = 0;
  87     virtual wxDialog *CreatePrintSetupDialog( wxWindow *parent, wxPrintData *data ) = 0;
  88     // b) Provide the "print to file" option ourselves or via print setup?
  89     virtual bool HasOwnPrintToFile() = 0;
  90     // c) Show current printer
  91     virtual bool HasPrinterLine() = 0;
  92     virtual wxString CreatePrinterLine() = 0;
  93     // d) Show Status line for current printer?
  94     virtual bool HasStatusLine() = 0;
  95     virtual wxString CreateStatusLine() = 0;
  96
  97
  98     virtual wxPrintNativeDataBase *CreatePrintNativeData() = 0;
  99
 100     static void SetPrintFactory( wxPrintFactory *factory );
 101     static wxPrintFactory *GetFactory();
 102 private:
 103     static wxPrintFactory *m_factory;
 104 };
 105
 106 class WXDLLIMPEXP_CORE wxNativePrintFactory: public wxPrintFactory
 107 {
 108 public:
 109     virtual wxPrinterBase *CreatePrinter( wxPrintDialogData *data );
 110
 111     virtual wxPrintPreviewBase *CreatePrintPreview( wxPrintout *preview,
 112                                                     wxPrintout *printout = NULL,
 113                                                     wxPrintDialogData *data = NULL );
 114     virtual wxPrintPreviewBase *CreatePrintPreview( wxPrintout *preview,
 115                                                     wxPrintout *printout,
 116                                                     wxPrintData *data );
 117
 118     virtual wxPrintDialogBase *CreatePrintDialog( wxWindow *parent,
 119                                                   wxPrintDialogData *data = NULL );
 120     virtual wxPrintDialogBase *CreatePrintDialog( wxWindow *parent,
 121                                                   wxPrintData *data );
 122
 123     virtual wxPageSetupDialogBase *CreatePageSetupDialog( wxWindow *parent,
 124                                                           wxPageSetupDialogData * data = NULL );
 125
 126     virtual wxDCImpl* CreatePrinterDCImpl( wxPrinterDC *owner, const wxPrintData& data );
 127
 128     virtual bool HasPrintSetupDialog();
 129     virtual wxDialog *CreatePrintSetupDialog( wxWindow *parent, wxPrintData *data );
 130     virtual bool HasOwnPrintToFile();
 131     virtual bool HasPrinterLine();
 132     virtual wxString CreatePrinterLine();
 133     virtual bool HasStatusLine();
 134     virtual wxString CreateStatusLine();
 135
 136     virtual wxPrintNativeDataBase *CreatePrintNativeData();
 137 };
 138
 139 //----------------------------------------------------------------------------
 140 // wxPrintNativeDataBase
 141 //----------------------------------------------------------------------------
 142
 143 class WXDLLIMPEXP_CORE wxPrintNativeDataBase: public wxObject
 144 {
 145 public:
 146     wxPrintNativeDataBase();
 147     virtual ~wxPrintNativeDataBase() {}
 148
 149     virtual bool TransferTo( wxPrintData &data ) = 0;
 150     virtual bool TransferFrom( const wxPrintData &data ) = 0;
 151
 152     virtual bool Ok() const { return IsOk(); }
 153     virtual bool IsOk() const = 0;
 154
 155     int  m_ref;
 156
 157 private:
 158     DECLARE_CLASS(wxPrintNativeDataBase)
 159     wxDECLARE_NO_COPY_CLASS(wxPrintNativeDataBase);
 160 };
 161
 162 //----------------------------------------------------------------------------
 163 // wxPrinterBase
 164 //----------------------------------------------------------------------------
 165
 166 /*
 167  * Represents the printer: manages printing a wxPrintout object
 168  */
 169
 170 class WXDLLIMPEXP_CORE wxPrinterBase: public wxObject
 171 {
 172 public:
 173     wxPrinterBase(wxPrintDialogData *data = NULL);
 174     virtual ~wxPrinterBase();
 175
 176     virtual wxWindow *CreateAbortWindow(wxWindow *parent, wxPrintout *printout);
 177     virtual void ReportError(wxWindow *parent, wxPrintout *printout, const wxString& message);
 178
 179     virtual wxPrintDialogData& GetPrintDialogData() const;
 180     bool GetAbort() const { return sm_abortIt; }
 181
 182     static wxPrinterError GetLastError() { return sm_lastError; }
 183
 184     ///////////////////////////////////////////////////////////////////////////
 185     // OVERRIDES
 186
 187     virtual bool Setup(wxWindow *parent) = 0;
 188     virtual bool Print(wxWindow *parent, wxPrintout *printout, bool prompt = true) = 0;
 189     virtual wxDC* PrintDialog(wxWindow *parent) = 0;
 190
 191 protected:
 192     wxPrintDialogData     m_printDialogData;
 193     wxPrintout*           m_currentPrintout;
 194
 195     static wxPrinterError sm_lastError;
 196
 197 public:
 198     static wxWindow*      sm_abortWindow;
 199     static bool           sm_abortIt;
 200
 201 private:
 202     DECLARE_CLASS(wxPrinterBase)
 203     wxDECLARE_NO_COPY_CLASS(wxPrinterBase);
 204 };
 205
 206 //----------------------------------------------------------------------------
 207 // wxPrinter
 208 //----------------------------------------------------------------------------
 209
 210 class WXDLLIMPEXP_CORE wxPrinter: public wxPrinterBase
 211 {
 212 public:
 213     wxPrinter(wxPrintDialogData *data = NULL);
 214     virtual ~wxPrinter();
 215
 216     virtual wxWindow *CreateAbortWindow(wxWindow *parent, wxPrintout *printout);
 217     virtual void ReportError(wxWindow *parent, wxPrintout *printout, const wxString& message);
 218
 219     virtual bool Setup(wxWindow *parent);
 220     virtual bool Print(wxWindow *parent, wxPrintout *printout, bool prompt = true);
 221     virtual wxDC* PrintDialog(wxWindow *parent);
 222
 223     virtual wxPrintDialogData& GetPrintDialogData() const;
 224
 225 protected:
 226     wxPrinterBase    *m_pimpl;
 227
 228 private:
 229     DECLARE_CLASS(wxPrinter)
 230     wxDECLARE_NO_COPY_CLASS(wxPrinter);
 231 };
 232
 233 //----------------------------------------------------------------------------
 234 // wxPrintout
 235 //----------------------------------------------------------------------------
 236
 237 /*
 238  * Represents an object via which a document may be printed.
 239  * The programmer derives from this, overrides (at least) OnPrintPage,
 240  * and passes it to a wxPrinter object for printing, or a wxPrintPreview
 241  * object for previewing.
 242  */
 243
 244 class WXDLLIMPEXP_CORE wxPrintout: public wxObject
 245 {
 246 public:
 247     wxPrintout(const wxString& title = _("Printout"));
 248     virtual ~wxPrintout();
 249
 250     virtual bool OnBeginDocument(int startPage, int endPage);
 251     virtual void OnEndDocument();
 252     virtual void OnBeginPrinting();
 253     virtual void OnEndPrinting();
 254
 255     // Guaranteed to be before any other functions are called
 256     virtual void OnPreparePrinting() { }
 257
 258     virtual bool HasPage(int page);
 259     virtual bool OnPrintPage(int page) = 0;
 260     virtual void GetPageInfo(int *minPage, int *maxPage, int *pageFrom, int *pageTo);
 261
 262     virtual wxString GetTitle() const { return m_printoutTitle; }
 263
 264     wxDC *GetDC() const { return m_printoutDC; }
 265     void SetDC(wxDC *dc) { m_printoutDC = dc; }
 266
 267     void FitThisSizeToPaper(const wxSize& imageSize);
 268     void FitThisSizeToPage(const wxSize& imageSize);
 269     void FitThisSizeToPageMargins(const wxSize& imageSize, const wxPageSetupDialogData& pageSetupData);
 270     void MapScreenSizeToPaper();
 271     void MapScreenSizeToPage();
 272     void MapScreenSizeToPageMargins(const wxPageSetupDialogData& pageSetupData);
 273     void MapScreenSizeToDevice();
 274
 275     wxRect GetLogicalPaperRect() const;
 276     wxRect GetLogicalPageRect() const;
 277     wxRect GetLogicalPageMarginsRect(const wxPageSetupDialogData& pageSetupData) const;
 278
 279     void SetLogicalOrigin(wxCoord x, wxCoord y);
 280     void OffsetLogicalOrigin(wxCoord xoff, wxCoord yoff);
 281
 282     void SetPageSizePixels(int w, int  h) { m_pageWidthPixels = w; m_pageHeightPixels = h; }
 283     void GetPageSizePixels(int *w, int  *h) const { *w = m_pageWidthPixels; *h = m_pageHeightPixels; }
 284     void SetPageSizeMM(int w, int  h) { m_pageWidthMM = w; m_pageHeightMM = h; }
 285     void GetPageSizeMM(int *w, int  *h) const { *w = m_pageWidthMM; *h = m_pageHeightMM; }
 286
 287     void SetPPIScreen(int x, int y) { m_PPIScreenX = x; m_PPIScreenY = y; }
 288     void SetPPIScreen(const wxSize& ppi) { SetPPIScreen(ppi.x, ppi.y); }
 289     void GetPPIScreen(int *x, int *y) const { *x = m_PPIScreenX; *y = m_PPIScreenY; }
 290     void SetPPIPrinter(int x, int y) { m_PPIPrinterX = x; m_PPIPrinterY = y; }
 291     void SetPPIPrinter(const wxSize& ppi) { SetPPIPrinter(ppi.x, ppi.y); }
 292     void GetPPIPrinter(int *x, int *y) const { *x = m_PPIPrinterX; *y = m_PPIPrinterY; }
 293
 294     void SetPaperRectPixels(const wxRect& paperRectPixels) { m_paperRectPixels = paperRectPixels; }
 295     wxRect GetPaperRectPixels() const { return m_paperRectPixels; }
 296
 297     // This must be called by wxPrintPreview to associate itself with the
 298     // printout it uses.
 299     virtual void SetPreview(wxPrintPreview *preview) { m_preview = preview; }
 300
 301     wxPrintPreview *GetPreview() const { return m_preview; }
 302     virtual bool IsPreview() const { return GetPreview() != NULL; }
 303
 304 private:
 305     wxString         m_printoutTitle;
 306     wxDC*            m_printoutDC;
 307     wxPrintPreview  *m_preview;
 308
 309     int              m_pageWidthPixels;
 310     int              m_pageHeightPixels;
 311
 312     int              m_pageWidthMM;
 313     int              m_pageHeightMM;
 314
 315     int              m_PPIScreenX;
 316     int              m_PPIScreenY;
 317     int              m_PPIPrinterX;
 318     int              m_PPIPrinterY;
 319
 320     wxRect           m_paperRectPixels;
 321
 322 private:
 323     DECLARE_ABSTRACT_CLASS(wxPrintout)
 324     wxDECLARE_NO_COPY_CLASS(wxPrintout);
 325 };
 326
 327 //----------------------------------------------------------------------------
 328 // wxPreviewCanvas
 329 //----------------------------------------------------------------------------
 330
 331 /*
 332  * Canvas upon which a preview is drawn.
 333  */
 334
 335 class WXDLLIMPEXP_CORE wxPreviewCanvas: public wxScrolledWindow
 336 {
 337 public:
 338     wxPreviewCanvas(wxPrintPreviewBase *preview,
 339                     wxWindow *parent,
 340                     const wxPoint& pos = wxDefaultPosition,
 341                     const wxSize& size = wxDefaultSize,
 342                     long style = 0,
 343                     const wxString& name = wxT("canvas"));
 344     virtual ~wxPreviewCanvas();
 345
 346     void SetPreview(wxPrintPreviewBase *preview) { m_printPreview = preview; }
 347
 348     void OnPaint(wxPaintEvent& event);
 349     void OnChar(wxKeyEvent &event);
 350     // Responds to colour changes
 351     void OnSysColourChanged(wxSysColourChangedEvent& event);
 352
 353 private:
 354 #if wxUSE_MOUSEWHEEL
 355     void OnMouseWheel(wxMouseEvent& event);
 356 #endif // wxUSE_MOUSEWHEEL
 357     void OnIdle(wxIdleEvent& event);
 358
 359     wxPrintPreviewBase* m_printPreview;
 360
 361     DECLARE_CLASS(wxPreviewCanvas)
 362     DECLARE_EVENT_TABLE()
 363     wxDECLARE_NO_COPY_CLASS(wxPreviewCanvas);
 364 };
 365
 366 //----------------------------------------------------------------------------
 367 // wxPreviewFrame
 368 //----------------------------------------------------------------------------
 369
 370 /*
 371  * Default frame for showing preview.
 372  */
 373
 374 class WXDLLIMPEXP_CORE wxPreviewFrame: public wxFrame
 375 {
 376 public:
 377     wxPreviewFrame(wxPrintPreviewBase *preview,
 378                    wxWindow *parent,
 379                    const wxString& title = _("Print Preview"),
 380                    const wxPoint& pos = wxDefaultPosition,
 381                    const wxSize& size = wxDefaultSize,
 382                    long style = wxDEFAULT_FRAME_STYLE | wxFRAME_FLOAT_ON_PARENT,
 383                    const wxString& name = wxFrameNameStr);
 384     virtual ~wxPreviewFrame();
 385
 386     void OnCloseWindow(wxCloseEvent& event);
 387     virtual void Initialize();
 388     virtual void CreateCanvas();
 389     virtual void CreateControlBar();
 390
 391     inline wxPreviewControlBar* GetControlBar() const { return m_controlBar; }
 392
 393 protected:
 394     wxPreviewCanvas*      m_previewCanvas;
 395     wxPreviewControlBar*  m_controlBar;
 396     wxPrintPreviewBase*   m_printPreview;
 397     wxWindowDisabler*     m_windowDisabler;
 398
 399 private:
 400     void OnChar(wxKeyEvent& event);
 401
 402     DECLARE_EVENT_TABLE()
 403     DECLARE_CLASS(wxPreviewFrame)
 404     wxDECLARE_NO_COPY_CLASS(wxPreviewFrame);
 405 };
 406
 407 //----------------------------------------------------------------------------
 408 // wxPreviewControlBar
 409 //----------------------------------------------------------------------------
 410
 411 /*
 412  * A panel with buttons for controlling a print preview.
 413  * The programmer may wish to use other means for controlling
 414  * the print preview.
 415  */
 416
 417 #define wxPREVIEW_PRINT        1
 418 #define wxPREVIEW_PREVIOUS     2
 419 #define wxPREVIEW_NEXT         4
 420 #define wxPREVIEW_ZOOM         8
 421 #define wxPREVIEW_FIRST       16
 422 #define wxPREVIEW_LAST        32
 423 #define wxPREVIEW_GOTO        64
 424
 425 #define wxPREVIEW_DEFAULT  (wxPREVIEW_PREVIOUS|wxPREVIEW_NEXT|wxPREVIEW_ZOOM\
 426                             |wxPREVIEW_FIRST|wxPREVIEW_GOTO|wxPREVIEW_LAST)
 427
 428 // Ids for controls
 429 #define wxID_PREVIEW_CLOSE      1
 430 #define wxID_PREVIEW_NEXT       2
 431 #define wxID_PREVIEW_PREVIOUS   3
 432 #define wxID_PREVIEW_PRINT      4
 433 #define wxID_PREVIEW_ZOOM       5
 434 #define wxID_PREVIEW_FIRST      6
 435 #define wxID_PREVIEW_LAST       7
 436 #define wxID_PREVIEW_GOTO       8
 437
 438 class WXDLLIMPEXP_CORE wxPreviewControlBar: public wxPanel
 439 {
 440     DECLARE_CLASS(wxPreviewControlBar)
 441
 442 public:
 443     wxPreviewControlBar(wxPrintPreviewBase *preview,
 444                         long buttons,
 445                         wxWindow *parent,
 446                         const wxPoint& pos = wxDefaultPosition,
 447                         const wxSize& size = wxDefaultSize,
 448                         long style = wxTAB_TRAVERSAL,
 449                         const wxString& name = wxT("panel"));
 450     virtual ~wxPreviewControlBar();
 451
 452     virtual void CreateButtons();
 453     virtual void SetZoomControl(int zoom);
 454     virtual int GetZoomControl();
 455     virtual wxPrintPreviewBase *GetPrintPreview() const
 456         { return m_printPreview; }
 457
 458     void OnWindowClose(wxCommandEvent& event);
 459     void OnNext();
 460     void OnPrevious();
 461     void OnFirst();
 462     void OnLast();
 463     void OnGoto();
 464     void OnPrint();
 465     void OnPrintButton(wxCommandEvent& WXUNUSED(event)) { OnPrint(); }
 466     void OnNextButton(wxCommandEvent & WXUNUSED(event)) { OnNext(); }
 467     void OnPreviousButton(wxCommandEvent & WXUNUSED(event)) { OnPrevious(); }
 468     void OnFirstButton(wxCommandEvent & WXUNUSED(event)) { OnFirst(); }
 469     void OnLastButton(wxCommandEvent & WXUNUSED(event)) { OnLast(); }
 470     void OnGotoButton(wxCommandEvent & WXUNUSED(event)) { OnGoto(); }
 471     void OnZoom(wxCommandEvent& event);
 472     void OnPaint(wxPaintEvent& event);
 473
 474 protected:
 475     wxPrintPreviewBase*   m_printPreview;
 476     wxButton*             m_closeButton;
 477     wxButton*             m_nextPageButton;
 478     wxButton*             m_previousPageButton;
 479     wxButton*             m_printButton;
 480     wxChoice*             m_zoomControl;
 481     wxButton*             m_firstPageButton;
 482     wxButton*             m_lastPageButton;
 483     wxButton*             m_gotoPageButton;
 484     long                  m_buttonFlags;
 485
 486 private:
 487     DECLARE_EVENT_TABLE()
 488     wxDECLARE_NO_COPY_CLASS(wxPreviewControlBar);
 489 };
 490
 491 //----------------------------------------------------------------------------
 492 // wxPrintPreviewBase
 493 //----------------------------------------------------------------------------
 494
 495 /*
 496  * Programmer creates an object of this class to preview a wxPrintout.
 497  */
 498
 499 class WXDLLIMPEXP_CORE wxPrintPreviewBase: public wxObject
 500 {
 501 public:
 502     wxPrintPreviewBase(wxPrintout *printout,
 503                        wxPrintout *printoutForPrinting = NULL,
 504                        wxPrintDialogData *data = NULL);
 505     wxPrintPreviewBase(wxPrintout *printout,
 506                        wxPrintout *printoutForPrinting,
 507                        wxPrintData *data);
 508     virtual ~wxPrintPreviewBase();
 509
 510     virtual bool SetCurrentPage(int pageNum);
 511     virtual int GetCurrentPage() const;
 512
 513     virtual void SetPrintout(wxPrintout *printout);
 514     virtual wxPrintout *GetPrintout() const;
 515     virtual wxPrintout *GetPrintoutForPrinting() const;
 516
 517     virtual void SetFrame(wxFrame *frame);
 518     virtual void SetCanvas(wxPreviewCanvas *canvas);
 519
 520     virtual wxFrame *GetFrame() const;
 521     virtual wxPreviewCanvas *GetCanvas() const;
 522
 523     // This is a helper routine, used by the next 4 routines.
 524
 525     virtual void CalcRects(wxPreviewCanvas *canvas, wxRect& printableAreaRect, wxRect& paperRect);
 526
 527     // The preview canvas should call this from OnPaint
 528     virtual bool PaintPage(wxPreviewCanvas *canvas, wxDC& dc);
 529
 530     // Updates rendered page by calling RenderPage() if needed, returns true
 531     // if there was some change. Preview canvas should call it at idle time
 532     virtual bool UpdatePageRendering();
 533
 534     // This draws a blank page onto the preview canvas
 535     virtual bool DrawBlankPage(wxPreviewCanvas *canvas, wxDC& dc);
 536
 537     // Adjusts the scrollbars for the current scale
 538     virtual void AdjustScrollbars(wxPreviewCanvas *canvas);
 539
 540     // This is called by wxPrintPreview to render a page into a wxMemoryDC.
 541     virtual bool RenderPage(int pageNum);
 542
 543
 544     virtual void SetZoom(int percent);
 545     virtual int GetZoom() const;
 546
 547     virtual wxPrintDialogData& GetPrintDialogData();
 548
 549     virtual int GetMaxPage() const;
 550     virtual int GetMinPage() const;
 551
 552     virtual bool Ok() const { return IsOk(); }
 553     virtual bool IsOk() const;
 554     virtual void SetOk(bool ok);
 555
 556     ///////////////////////////////////////////////////////////////////////////
 557     // OVERRIDES
 558
 559     // If we own a wxPrintout that can be used for printing, this
 560     // will invoke the actual printing procedure. Called
 561     // by the wxPreviewControlBar.
 562     virtual bool Print(bool interactive) = 0;
 563
 564     // Calculate scaling that needs to be done to get roughly
 565     // the right scaling for the screen pretending to be
 566     // the currently selected printer.
 567     virtual void DetermineScaling() = 0;
 568
 569 protected:
 570     // helpers for RenderPage():
 571     virtual bool RenderPageIntoDC(wxDC& dc, int pageNum);
 572     // renders preview into m_previewBitmap
 573     virtual bool RenderPageIntoBitmap(wxBitmap& bmp, int pageNum);
 574
 575     void InvalidatePreviewBitmap();
 576
 577 protected:
 578     wxPrintDialogData m_printDialogData;
 579     wxPreviewCanvas*  m_previewCanvas;
 580     wxFrame*          m_previewFrame;
 581     wxBitmap*         m_previewBitmap;
 582     bool              m_previewFailed;
 583     wxPrintout*       m_previewPrintout;
 584     wxPrintout*       m_printPrintout;
 585     int               m_currentPage;
 586     int               m_currentZoom;
 587     float             m_previewScaleX;
 588     float             m_previewScaleY;
 589     int               m_topMargin;
 590     int               m_leftMargin;
 591     int               m_pageWidth;
 592     int               m_pageHeight;
 593     int               m_minPage;
 594     int               m_maxPage;
 595
 596     bool              m_isOk;
 597     bool              m_printingPrepared; // Called OnPreparePrinting?
 598
 599 private:
 600     void Init(wxPrintout *printout, wxPrintout *printoutForPrinting);
 601
 602     wxDECLARE_NO_COPY_CLASS(wxPrintPreviewBase);
 603     DECLARE_CLASS(wxPrintPreviewBase)
 604 };
 605
 606 //----------------------------------------------------------------------------
 607 // wxPrintPreview
 608 //----------------------------------------------------------------------------
 609
 610 class WXDLLIMPEXP_CORE wxPrintPreview: public wxPrintPreviewBase
 611 {
 612 public:
 613     wxPrintPreview(wxPrintout *printout,
 614                    wxPrintout *printoutForPrinting = NULL,
 615                    wxPrintDialogData *data = NULL);
 616     wxPrintPreview(wxPrintout *printout,
 617                    wxPrintout *printoutForPrinting,
 618                    wxPrintData *data);
 619     virtual ~wxPrintPreview();
 620
 621     virtual bool SetCurrentPage(int pageNum);
 622     virtual int GetCurrentPage() const;
 623     virtual void SetPrintout(wxPrintout *printout);
 624     virtual wxPrintout *GetPrintout() const;
 625     virtual wxPrintout *GetPrintoutForPrinting() const;
 626     virtual void SetFrame(wxFrame *frame);
 627     virtual void SetCanvas(wxPreviewCanvas *canvas);
 628
 629     virtual wxFrame *GetFrame() const;
 630     virtual wxPreviewCanvas *GetCanvas() const;
 631     virtual bool PaintPage(wxPreviewCanvas *canvas, wxDC& dc);
 632     virtual bool UpdatePageRendering();
 633     virtual bool DrawBlankPage(wxPreviewCanvas *canvas, wxDC& dc);
 634     virtual void AdjustScrollbars(wxPreviewCanvas *canvas);
 635     virtual bool RenderPage(int pageNum);
 636     virtual void SetZoom(int percent);
 637     virtual int GetZoom() const;
 638
 639     virtual bool Print(bool interactive);
 640     virtual void DetermineScaling();
 641
 642     virtual wxPrintDialogData& GetPrintDialogData();
 643
 644     virtual int GetMaxPage() const;
 645     virtual int GetMinPage() const;
 646
 647     virtual bool Ok() const { return IsOk(); }
 648     virtual bool IsOk() const;
 649     virtual void SetOk(bool ok);
 650
 651 private:
 652     wxPrintPreviewBase *m_pimpl;
 653
 654 private:
 655     DECLARE_CLASS(wxPrintPreview)
 656     wxDECLARE_NO_COPY_CLASS(wxPrintPreview);
 657 };
 658
 659 //----------------------------------------------------------------------------
 660 // wxPrintAbortDialog
 661 //----------------------------------------------------------------------------
 662
 663 class WXDLLIMPEXP_CORE wxPrintAbortDialog: public wxDialog
 664 {
 665 public:
 666     wxPrintAbortDialog(wxWindow *parent,
 667                        const wxString& title,
 668                        const wxPoint& pos = wxDefaultPosition,
 669                        const wxSize& size = wxDefaultSize,
 670                        long style = 0,
 671                        const wxString& name = wxT("dialog"))
 672         : wxDialog(parent, wxID_ANY, title, pos, size, style, name)
 673         {
 674         }
 675
 676     void OnCancel(wxCommandEvent& event);
 677
 678 private:
 679     DECLARE_EVENT_TABLE()
 680     wxDECLARE_NO_COPY_CLASS(wxPrintAbortDialog);
 681 };
 682
 683 #endif // wxUSE_PRINTING_ARCHITECTURE
 684
 685 #endif
 686     // _WX_PRNTBASEH__